ANT100Y1 Lecture Notes - Lecture 3: Lesser Trochanter, Sphenoid Bone, Greater Trochanter
49
ANT100Y1 Full Course Notes
Verified Note
49 documents
Document Summary
206 bones in the adult skeleton, 460 ocs at birth, 806 ocs at 10 weeks gestation. At 10 weeks gestation, the sphenoid bone in the skull has already begun ossification (early!) It takes 6 years for all the carpals to mineralized. As ocs fuse together into a single oc, the number of ocs decrease. Human are not unusual in the stages they go through but are unusual in the timing of the stages compared to other primates. Notice that human gestation period is not a lot longer than that of the orangutan. The human infancy period is 5 years which is roughly equal to the 3. 5 years of the great apes. Osteoblasts and osteblasts work together, influenced by genes, diet, environment. Sun light allows the body to produce vitamin d which is essential for bone growth and maintenance. Estrogens and androgens tends to stimulate bone formation. Parathyroid hormone (pth) tends to stimulate bone removal.
